Combustor

Abstract

The present disclosure relates to a combustor. The burner includes: a main body; a cover disposed on the top of the main body and coupled to the main body to define a mixing tube in which gas and air flow and are mixed with each other; and a head disposed on top of the cover and configured to generate a flame, in which the head includes: a first flame generating portion disposed in a central region of the head; and a second flame generating portion disposed in an outer region of the head. The body, the cap, and the head are configured such that gas discharged from the mixing tube flows through the cap and to a central region of the cap, then is divided into a plurality of portions in the central region of the cap, then one portion thereof flows into the first flame generating portion, and the other portion thereof flows to an outer region of the cap and into the second flame generating portion.

Description

Technical Field

[0001] The present disclosure relates to a burner, and more particularly, to a burner having a simplified flow passage structure for the flow of fuel gas. Background Art

[0002] The contents described in this background section merely provide background information for the present disclosure and do not constitute prior art.

[0003] The burner emits a flame and typically receives gas from an external source and ignites the gas to produce a flame. The burner may be installed in a cooking appliance.

[0004] The burner may be used for a gas stove or a stove of a combination cooking appliance using both gas and electricity, and may receive gas from an external source and burn the gas to generate a flame.

[0005] The burner can be composed of two flame generating parts, and each of the two flame generating parts usually generates a flame having a ring shape. The two flame generating parts can respectively generate an inner flame of a small ring shape and an outer flame of a large ring shape surrounding the small ring shape.

[0006] In this structure, separate gas flow paths are usually formed for the two flame generating parts respectively to transport the combustion gas between the two flame generating parts spaced apart from each other. In this general structure, a plurality of gas flow paths independent of each other should be provided in the burner.

[0007] Furthermore, since the burner is provided with a plurality of gas injection holes, a plurality of pipes connecting the external source and the gas injection holes of the burner to each other should be provided.

[0008] The burner of the above structure has a complex structure for forming a gas flow path, so that the overall structure of the burner is complex. Therefore, due to the complex structure, the gas does not flow smoothly, the burner performance is deteriorated, and the manufacturing cost is increased.

[0009] In order to solve this problem, it is necessary to manufacture a burner having a single gas injection hole and a gas flow path connected to the hole and divided into a plurality of flame generation parts spaced apart from each other. Summary of the invention

[0010] An object of the present disclosure is to provide a burner having a structure that improves performance and saves production costs.

[0011] Furthermore, an object of the present disclosure is to provide a burner having a structure that simplifies a path through which fuel gas flows.

[0012] Furthermore, an object of the present disclosure is to provide a burner having a structure that smoothly guides the flow of fuel gas.

[0013] The purpose according to the present disclosure is not limited to the above-mentioned purpose. Other purposes and advantages not mentioned according to the present disclosure can be understood based on the following description, and can be more clearly understood based on the embodiments according to the present disclosure. In addition, it will be easily understood that the purposes and advantages according to the present disclosure can be achieved using the devices shown in the claims or their combinations.

[0014] A burner according to one embodiment may include: a body; a cover, which is arranged on the top of the body and connected to the body to define a mixing tube in which gas and air flow and mix with each other; and a head, which is arranged on the top of the cover and is configured to generate a flame, wherein the head includes: a first flame generating part, which is arranged in a central area of ​​the head; and a second flame generating part, which is arranged in an outer area of ​​the head.

[0015] The main body, cover and head are configured so that: the gas discharged from the mixing tube flows through the cover and flows to the central area of ​​the cover, and then is divided into a plurality of parts in the central area of ​​the cover, and then one part thereof flows into the first flame generating part, and the remaining part thereof flows to the outer area of ​​the cover and flows into the second flame generating part.

[0016] Therefore, the burner may be configured such that the fuel gas discharged from a single mixing tube may be supplied to the first flame generating portion and the second flame generating portion in a divided manner.

[0017] The header may include a diffusion hole connected to the second conduit, wherein the gas may flow through the diffusion hole.

[0018] The header may include a gas diffusion portion through which the gas having flowed through the diffusion holes diffuses, wherein the gas diffusion portion is embodied as a space surrounded by an upper surface of the header and the second flame generating portion and extends along a circumference of the header.

[0019] The upper surface of the head has an inclined diffusion surface, which is provided at a position where the diffusion hole and the gas diffusion portion are connected to each other, wherein the inclined diffusion surface contacts each of two opposite ends of the diffusion hole and is inclined in a circumferential direction or a radial direction of the head. The gas flowing along the inclined diffusion surface can be uniformly diffused to the entire gas diffusion portion.

[0020] The gas having flowed through the through holes may flow from the outer region of the head toward the central region of the head through the second conduit and may then be divided into a plurality of parts.

[0021] One of the multiple parts reaches the first flame generating part, is ejected through the first flame hole and burns. Another part of the multiple parts of the fuel gas again passes through the second conduit and flows from the central area of ​​the head to the outer area of ​​the head and flows through the diffusion hole, then reaches the second flame generating part, is ejected through the second flame hole and burns.

[0022] In the burner according to the present disclosure, the overall structure of the burner according to the embodiment of the present disclosure can be simplified compared to a structure in which an external source is connected to a plurality of pipes and a plurality of gas flow paths and flame generating parts connected to the plurality of pipes are independently provided. In addition, the burner according to the embodiment of the present disclosure can be connected to the external source through a single pipe. This simple structure allows the gas to flow smoothly inside the burner, improves the burner performance, and saves the manufacturing cost of the burner.

[0023] In addition, in the burner according to the present disclosure, while the gas flowing into the gas diffusion part through the diffusion hole further flows upward, the gas can be guided along the inclined diffusion surface so as to smoothly diffuse into the gas diffusion part and then uniformly distributed throughout the gas diffusion part. As a result, the second flame generating part can receive a uniform gas supply in its circumferential direction, thereby generating a uniform flame in its circumferential direction.

[0024] In addition, in the burner according to the present disclosure, the gas discharged from a single mixing tube can be divided into a plurality of parts, which can be respectively supplied to a plurality of flame generating parts radially spaced apart from each other in the burner. Due to this structure, the flow channels for gas supply to the flame generating parts can be integrated with each other. A single supply pipeline can be used to supply gas to the burner, and the flow channel structure in the burner can be simplified.

[0025] In addition to the above-described effects, specific effects of the present disclosure and specific details for implementing the present disclosure will be described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a perspective view showing a burner according to one embodiment.

[0027] Figure 2 yes Figure 1 Side view of.

[0028] Figure 3 yes Figure 1 Rear view of.

[0029] Figure 4 yes Figure 1 Exploded top view of a stereogram.

[0030] Figure 5 yes Figure 1 Exploded bottom-up stereogram.

[0031] Figure 6 is a side cross-sectional view of the burner.

[0032] Figure 7 It is a perspective view showing a main body and a cover of a burner.

[0033] Figure 8 yes Figure 7 Exploded diagram of .

[0034] Fig. 9 yes Figure 7 Top view of the .

[0035] Fig.10 yes Figure 7 Bottom view of .

[0036] Fig.11 It is a three-dimensional image of the subject.

[0037] Fig.12 yes Fig.11 Top view of the .

[0038] Fig.13 It is a three-dimensional diagram of the lid.

[0039] Fig.14 yes Fig.13 Bottom view of .

[0040] Fig.15 yes Fig.13 Top view of the .

[0041] Fig.16 is a perspective view showing the cover and the head.

[0042] Fig.17 yes Fig.16 Exploded top view of a stereogram.

[0043] Fig.18 yes Fig.16 A bottom-up stereogram of .

[0044] Fig.19 yes Fig.16 Top view of the .

[0045] Fig. 20 It is a three-dimensional image of the head.

[0046] Fig.21 yes Fig. 20 Bottom view of .

[0047] Fig. 22 yes Fig. 20 Top view of the .

[0048] Fig.23 yes Fig. 20 Views in different directions.

[0049] Fig.24 yes Fig.23 An enlarged view of portion 24.

[0050] Fig.25 yes Fig.23 An enlarged view of portion 25.

[0051] Fig.26 It is a perspective view showing a state in which the outer cap and the inner cap are mounted on the head.

[0052] Fig. 27 yes Fig.26 Cross-sectional view of .

[0053] Fig.28 yes Fig. 27 An enlarged view of portion 28 of the embodiment.

[0054] Fig.29 It is a perspective view showing the inner cap.

[0055] Fig.30 is a diagram for illustrating the flow of gas in a burner according to one embodiment. DETAILED DESCRIPTION

[0056] The above-mentioned objects, features and advantages will be described in detail later with reference to the accompanying drawings so that a person skilled in the art of the present disclosure can easily practice the technical ideas of the present disclosure. When describing the present disclosure, when it is determined that the detailed description of the known technology related to the present disclosure may unnecessarily obscure the main points of the present disclosure, its detailed description will be omitted. Hereinafter, a preferred embodiment according to the present disclosure will be described in detail with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals are used to represent the same or similar parts.

[0057] It is understood that although the terms "first", "second", and "third" etc. may be used herein to describe various elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms are used to distinguish one element, component, region, layer, or section from another element, component, region, layer, or section. Therefore, without departing from the spirit and scope of the present disclosure, the first element, component, region, layer, or section described below may be referred to as a second element, component, region, layer, or section.

[0058] As used herein, the singular forms "a" and "an" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0059] It will also be understood that the terms “include” and “comprising” when used in this specification specify the presence of stated features, integers, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, operations, elements, components and / or portions thereof.

[0060] Throughout this disclosure, unless otherwise specified, "A and / or B" means A, B, or A and B, and "C to D" means C to D inclusive, unless otherwise specified.

[0061] The burner according to the embodiment may be used for a gas stove or a stove of a combined cooking appliance using both gas and electricity, and may receive gas from an external source and burn the gas to generate flames.

[0062] The burner can be composed of two flame generating parts, and each of the two flame generating parts usually generates a flame having a ring shape. The two flame generating parts can respectively generate an inner flame of a small ring shape and an outer flame of a large ring shape surrounding the small ring shape.

[0063] In this structure, separate gas flow paths are usually formed for the two flame generating parts respectively to transport the combustion gas between the two flame generating parts spaced apart from each other. In this general structure, a plurality of gas flow paths independent of each other should be provided in the burner.

[0064] Furthermore, since the burner is provided with a plurality of gas injection holes, a plurality of pipes connecting the external source and the gas injection holes of the burner to each other should be provided.

[0065] The burner of the above structure has a complex structure for forming a gas flow path, so that the overall structure of the burner is complex. Therefore, due to the complex structure, the gas does not flow smoothly, the burner performance is deteriorated, and the manufacturing cost is increased.

[0066] In order to solve this problem, it is necessary to manufacture a burner having a single gas injection hole and a gas flow path connected to the hole and divided into a plurality of flame generation parts spaced apart from each other.

[0067] The burner according to the embodiment has a structure to solve the above-mentioned problems, and the burner according to the embodiment will be described in detail below.

[0068] Figure 1 is a perspective view showing a burner according to one embodiment. Figure 2 yes Figure 1 Side view of. Figure 3 yes Figure 1 The burner according to the embodiment may include a body 500 , a cover 600 , a head 700 , an inner cap 820 , and an outer cap 810 .

[0069] The body 500 may constitute the lower portion of the burner and may be connected to an external source through a pipe so that the body receives gas required for combustion from the external source. The cover 600 may be disposed on the top of the body 500 and may be coupled to the body 500 to define a mixing pipe 501 in which the gas and air flow and mix with each other.

[0070] In the illustrated embodiment, the cover 600 and the body 500 are manufactured separately from each other. However, in another embodiment, the cover 600 and the body 500 may be integrated into a single body.

[0071] The mixing tube 501 may be embodied as a space in the burner. The gas flowing from an external source to the burner and the air flowing from the environment surrounding the burner to the burner may meet and mix with each other in the mixing tube 501. The gas may be mixed with the air, and thus may receive oxygen from the air required for combustion, so that it may be burned in the head 700.

[0072] The mixing tube 501 may be formed by combining a body 500 and a cover 600 with each other. The body 500 may constitute approximately a lower half of the mixing tube 501, and the cover 600 may constitute approximately an upper half of the mixing tube 501.

[0073] The head 700 may be disposed on the top of the cover 600, and a flame may be generated in the head 700. The head 700 may be coupled to the cover 600 to form a path through which the gas flowing into the head 700 and the cover 600 through the body 500 flows. The gas flow path formed by combining the head and the cover 600 with each other may distribute the gas to the first flame generating portion 710 and the second flame generating portion 720, which will be described in detail below.

[0074] The inner cap 820 may cover the top of the first flame generating portion 710 where the flame may be generated, and may control the diffusion direction of the flame so that the flame is directed outward in the radial direction of the head 700. The outer cap 810 may cover the top of the second flame generating portion 720 where the flame may be generated, and may control the diffusion direction of the flame so that the flame is directed outward in the radial direction of the head 700.

[0075] Figure 4 yes Figure 1 Exploded top view of a stereogram. Figure 5 yes Figure 1 The head 700 may include a flame generating portion. In the flame generating portion, when the gas is discharged to the outside of the burner, the gas is ignited by a spark plug (not shown), thereby generating a flame.

[0076] The head 700 may include a first flame generating portion 710 where flames may be generated and a second flame generating portion 720. The first flame generating portion 710 may be disposed in a central region of the head 700, and a plurality of first flame holes 711 may be defined in the first flame generating portion 710 and may be arranged along a periphery thereof.

[0077] The second flame generating portion 720 may be provided in the outer region of the head 700 and may be arranged to surround the first flame generating portion 710. A plurality of second flame holes 721 may be defined in the second flame generating portion 720 and may be arranged along the periphery thereof. Therefore, when flames may be generated in the burner, an inner annular flame and an outer annular flame may be generated in a dual manner.

[0078] The gas flowing inside the burner may be discharged through the first flame hole 711 and the second flame hole 721. When the gas is ignited, a flame may be generated at an outlet of each of the first flame hole 711 and the second flame hole 721, so that the flame may be maintained while the gas is discharged.

[0079] The first flame generating part 710 and the second flame generating part 720 may be separate components and may be spaced apart from each other. Therefore, it is necessary to supply the gas separately to each of the first flame generating part 710 and the second flame generating part 720. In an embodiment, one mixing tube 501 may be used, and the gas flowing from one pipeline to the mixing tube may flow through the single mixing tube 501.

[0080] Therefore, the gas discharged from one mixing tube 501 should flow into the first flame generating portion 710 and the second flame generating portion 720 spaced apart from each other. To this end, inside the burner, a flow channel needs to be formed to distribute the gas discharged from the mixing tube 501 to each of the first flame generating portion 710 in the center region and the second flame generating portion 720 in the outer region.

[0081] In the burner according to an embodiment of the present disclosure, the gas discharged from the mixing tube 501 can flow through the cover 600, and can flow toward the central area of ​​the cover 600, and can be divided into a plurality of parts, and then one part thereof can flow into the first flame generating part 710, and the remaining part thereof can flow toward the outer area of ​​the cover 600, and can flow into the second flame generating part 720.

[0082] In other words, the gas discharged from the mixing tube 501 may flow through the cover 600 and reach the outer area of ​​the upper surface of the cover 600. Then, the gas may flow from the outer area of ​​the cover 600 to the central area of ​​the cover 600 and may be divided into a plurality of parts. One part thereof may flow from the central area of ​​the cover 600 through the head 700 and may reach the upper surface of the head 700 and may flow into the first flame generating part 710 in the central area of ​​the head 700.

[0083] Another part of the portion may flow from the central area of ​​the space on the upper surface of the cover 600 to the outer area, and may flow through the head 700, and may reach the upper surface of the head 700, and may flow into the second flame generating portion 720 in the outer area of ​​the head 700.

[0084] Due to this structure, the gas flowing into a common mixing tube 501 can be divided into two parts inside the burner when flowing through the flow channel formed in the burner, and then the two parts can flow into the first flame generating part 710 and the second flame generating part 720 respectively.

[0085] Therefore, compared with a structure in which an external source is connected to a plurality of pipes and a plurality of gas flow paths connected to the plurality of pipes are provided independently of each other and a flame generating part, the overall structure of the burner according to the embodiment of the present disclosure can be simplified. In addition, the burner according to the embodiment of the present disclosure can be connected to the external source through a single pipe. This simple structure allows the gas to flow smoothly inside the burner, improves the burner performance, and saves the manufacturing cost of the burner.

[0086] Figure 6 is a side cross-sectional view of the burner. In the drawings described below, solid arrows are used to indicate the flow of gas. Figure 6 In FIG. 1 , dashed arrows are used to represent the flow of air from the surrounding environment into the burner.

[0087] The body 500 may include an injection portion 530 and an air receiving portion 540. The injection portion 530 may be formed at one side of the body 500, and a gas injection hole 531 may be defined in the injection portion 530. The gas injection hole 531 may be formed to extend through the injection portion 530, and may have an inlet connected to a pipe connected to an external source supplying gas.

[0088] The injection part 530, the air receiving part 540 and the mixing tube 501 may be arranged in a straight line. Due to this structure, the gas having flowed through the injection part 530 may flow through the air receiving part 540 and the mixing tube 501 smoothly.

[0089] The gas injection hole 531 may be formed in the injection portion 530 so as to extend through the injection portion 530 .

[0090] The air receiving portion 540 may be provided between the inlet of the mixing tube 501 and the outlet of the injection portion 530. A space into which the supply gas is introduced and stored may be formed in the air receiving portion 540. In one example, the air guide 701 may protrude downward from the head 700 and may cover the space of the air receiving portion 540. The air guide 701 may be formed in a substantially "U" shape so as to be combined with the air receiving portion 540 to form a space into which the supply air flows.

[0091] The air guide 701 may cover the space of the air receiving portion 540, but may be coupled to the air receiving portion 540 to form a hole for the surrounding air to flow into in the rear side of the burner. Through the hole, the air around the burner may flow into the space of the air receiving portion 540.

[0092] The inlet of the gas injection hole 531 may be relatively wide, and its outlet may be relatively narrow. For example, the outlet of the gas injection hole 531 may be provided with an orifice so that the gas flowing into the body 500 through the gas injection hole 531 can be injected from the outlet of the gas injection hole 531 at a very high speed.

[0093] The gas injected from the outlet of the gas injection hole 531 can flow into the mixing tube 501 without dispersion due to its very high flow rate. At this time, the gas can meet the air flowing into the air receiving part 540 when flowing through the air receiving part 540, and at the same time, the air can flow into the mixing tube 501.

[0094] When the fuel gas flows through the mixing tube 501, the fuel gas may be mixed with the air that has been introduced into the air receiving portion 540, and then the mixture of the fuel gas and the air may be discharged from the mixing tube 501. In this way, the fuel gas may be mixed with the air in the mixing tube 501, and may be mixed with oxygen in the air. Therefore, when the mixture is ignited by a spark plug, the mixture may burn.

[0095] For example, the mixing tube 501 may be embodied as a venturi tube. The venturi tube may be formed such that the cross-sectional area of ​​each of its inlet and outlet is relatively large, and the cross-sectional area of ​​its central region is relatively narrow.

[0096] Therefore, in the neck region of the narrower cross-sectional area in the central region of the mixing tube 501, the gas flow velocity is fastest in the mixing tube 501, so that the pressure can be reduced in the central region.

[0097] The mixing tube 501 may be embodied as a venturi tube. Therefore, the pressure in the neck region is lower than the pressure in the region adjacent thereto. Therefore, due to the pressure difference, the air with a relatively high pressure in the space of the air receiving portion 540 may flow smoothly into the mixing tube 501, thereby being mixed with the gas in the mixing tube.

[0098] Figure 7 1 is a perspective view showing a main body 500 and a cover 600 of a burner. Figure 8 yes Figure 7 Exploded diagram of . Fig. 9 yes Figure 7 Top view of the . Fig.10 yes Figure 7 Bottom view of . Fig.11 It is a perspective view of the main body 500. Fig.12 yes Fig.11 Top view of the .

[0099] The body 500 may include a lower unit 510 and a first duct 520. The lower unit 510 may be recessed from an upper surface of the body 500 into the body 500 and may constitute a lower portion of the mixing tube 501. The lower unit 510 may constitute approximately half of the mixing tube 501.

[0100] However, since at least a portion of the upper unit 620 formed on the cover 600 is received in the recessed space of the lower unit 510 , the recessed space of the lower unit 510 constituting the mixing tube 501 may be deeper than half the depth of the mixing tube 501 .

[0101] The first duct 520 may be connected to the outlet of the mixing tube 501, and may have two parts connected to the outlet of the mixing tube 501 and extending in opposite directions along the circumferential direction of the body 500, respectively. A part of the first duct 520 may be closed with a cover 600, and the gas may flow in the first duct 520. The top of the first duct 520 may be closed with the cover 600 to form a gas flow path.

[0102] The first duct 520 may be embodied as a space connected to the outlet of the mixing tube 501, and may change the flow direction of the gas discharged from the mixing tube 501 to an upward direction. The gas discharged from the mixing tube 501 may flow upward along the first duct 520, and may flow into the space on the upper surface of the cover 600.

[0103] The body 500 may include a cap receiving groove 550, a first spark plug receiving hole 560, and an extension panel 570. The cap receiving groove 550 may be recessed from an upper surface of the body 500 into the body, and may have a shape corresponding to that of the cap 600 so that the cap 600 is received therein.

[0104] A hole into which a fastening device such as a bolt is fastened may be formed in the bottom surface defining the cover receiving groove 550, and a hole corresponding thereto may be formed in the cover 600, so that the cover 600 can be coupled to the body 500 using the fastening device. Since the cover 600 is seated in the cover receiving groove 550, the cover 600 can be accurately positioned at a designated position of the body 500.

[0105] The first spark plug receiving hole 560 may be formed at a position overlapping with the cover 600, and the spark plug may be inserted and installed in the first spark plug receiving hole 560. In one example, the cover 600 may have a second spark plug receiving hole 650 defined therein, into which the spark plug is inserted at a position corresponding to the first spark plug receiving hole 560.

[0106] In the illustrated embodiment, the first spark plug receiving hole 560 may be disposed adjacent to the first flame generating portion 710 disposed in the central region of the burner. In this structure, the first flame generating portion 710 may be ignited first, and the second flame generating portion 720 may be ignited later.

[0107] In another embodiment, the first spark plug receiving hole 560 may be disposed adjacent to the second flame generating portion 720 disposed in the outer region of the burner. In this structure, the second flame generating portion 720 may be ignited first, and the first flame generating portion 710 may be ignited later.

[0108] The extension panel 570 may surround the cover receiving groove 550 and extend in the circumferential direction of the body 500. The extension panel 570 may be generally provided in a disc shape. A hole into which a fastening device is inserted may be formed in the extension panel 570.

[0109] Therefore, the burner may be mounted on the gas range or the hybrid cooking appliance by coupling the extension panel 570 to the stove of the gas range or the combination cooking appliance using the fastening means.

[0110] Fig.13 It is a perspective view of the cover 600 . Fig.14 yes Fig.13 Bottom view of . Fig.15 yes Fig.13 The cover 600 may have a plan area smaller than that of the main body 500. As described above, the cover 600 may be seated in the cover receiving groove 550 of the main body 500 and may be coupled to the cover 600 using a fastening device.

[0111] The cover 600 may include a through hole 610 formed at a position overlapping at least a portion of the first duct 520. The gas may flow through the through hole 610. The through hole 610 through which the gas may flow may be formed in the cover 600 at a portion overlapping at least the inclined guide surface 121. The gas may flow upward along the first duct 520, may flow through the cover 600 through the through hole 610, and may flow into the space on the upper surface of the cover 600.

[0112] In addition, the cover 600 may include an upper unit 620 constituting the mixing tube 501. The upper unit 620 may be formed to protrude downward toward the body 500, and may have an inner space defined therein so as to be recessed upward from a lower surface thereof into the upper unit 620. The inner space may constitute an upper portion of the mixing tube 501.

[0113] The upper unit 620 may constitute about half of the mixing tube 501. However, the upper unit 620 may be inserted into a groove defined in the lower unit 510 of the body 500 to define the mixing tube 501.

[0114] In the illustrated embodiment, the upper unit 620 may be integrally formed with the cover 600. However, in another embodiment, the upper unit 620 may be formed as a structure separate from the cover 600. Furthermore, in yet another embodiment, the upper unit 620 may be integrally formed with the lower unit 510.

[0115] In one example, the burner may include a second duct 630. The second duct 630 may be formed by combining the cap 600 and the head 700 with each other, and may provide a space into which the gas flowing from the body 500 may flow from an outer region of the head 700 to a central region thereof.

[0116] The fuel gas discharged from the first duct 520 may flow toward the central area of ​​the header 700 through the second duct 630 and may be divided into portions that may be supplied to the first flame generating portion 710 and the second flame generating portion 720, respectively.

[0117] The gas may be divided into a plurality of parts using a gas injection hole 531 equipped with orifices and a mixing pipe 501 so that the parts of the gas may be respectively supplied to the first flame generating part 710 and the second flame generating part 720 spaced apart from each other.

[0118] The cover 600 may include a through hole 610 and a lower portion 640. In addition to the above description, the through hole 610 may be connected to the first duct 520 and allow the gas to flow through the first duct 520. The gas may flow through the through hole 610, and then, a portion thereof may flow into the second duct 630, and the remaining portion thereof may flow into the second flame generating portion 720.

[0119] The through hole 610 may include a pair of through holes that are spaced apart from each other in the circumferential direction and extend in the circumferential direction and in the outer region of the cover 600. The through hole 610 may be provided on the top of the first duct 520, and the flow direction of the gas in the first duct 520 may be rapidly changed in the through hole 610.

[0120] Therefore, in order to allow the gas to flow smoothly between the mixing tube 501 and the second conduit 630 , the first conduit 520 may be formed as a relatively large space, so that the area size of the through hole 610 may be increased.

[0121] If a single through hole 610 having a large area size is formed, the rigidity of the cover 600 may be weakened. Therefore, according to an embodiment, the through hole 610 may include a pair of through holes spaced apart from each other in the circumferential direction, and a bridge portion may be provided between the through holes 610 to enhance the rigidity of the cover 600.

[0122] In addition, fastening holes may be defined in the bridge portion between the through holes 610 so that fastening means may be inserted and fastened to the fastening holes. Therefore, various holes may be effectively arranged in the entire area of ​​the cover 600. The fastening means inserted and fastened to the fastening holes may be used to strengthen the connection between the cover 600 and the body 500.

[0123] The lower portion 640 may be formed such that a portion thereof surrounds the through hole 610, may protrude upward from the upper surface of the cover 600, and may constitute a lower portion of the second duct 630. The lower portion 640 and the upper portion 740 formed on the head 700 may be combined with each other to define the second duct 630.

[0124] The lower portion 640 may include a first flow channel defining portion 641, a first central portion 642, a first outer portion 643, and a first connection portion 644. The first flow channel defining portion 641 may surround the through hole 610 and may define a flow channel extending from the through hole 610 to a central area of ​​the cover 600.

[0125] The gas that has flowed through the through holes 610 and has flowed into the space on the upper surface of the cover may flow from the outer region of the cover 600 toward the central region thereof along the first flow passage defining portion 641 .

[0126] The first central portion 642 may be formed in a central area of ​​the cover 600, may be connected to the first flow passage defining portion 641, and may define a flow passage connected to the first flame generating portion 710. In the first central portion 642, the gas may be divided into a plurality of portions such that one portion may flow toward the first flame generating portion 710 and the remaining portion may flow toward the second flame generating portion 720.

[0127] A portion of the gas flowing into the first center portion 642 may flow upward and flow into the first flame generating portion 710 , and another portion thereof may flow back to the outer area of ​​the cover 600 along the first connection portion 644 and may reach the first outer portion 643 .

[0128] The first outer portion 643 may be provided in the outer region of the cover 600, may define a flow passage connected to the second flame generating portion 720, and may include a pair of first outer portions spaced apart from each other in the circumferential direction. The gas flowing into the first outer portion 643 may flow upward, may flow through the diffusion hole 730 of the head portion 700, and may flow toward the space on the upper surface of the head portion, and may reach the second flame generating portion 720.

[0129] The first connection part 644 may define a flow channel connecting the inner space of the first outer part 643 and the inner space of the first central part 642 to each other. Since the first outer part 643 includes a pair of first outer parts, the first connection part 644 may include a pair of first connection parts connected to the pair of first outer parts 643, respectively.

[0130] The gas flowing into the first flow channel defining portion 641 may flow through the first central portion 642 and the first connection portion 644, and may flow upward in the first outer portion 643. In order to allow the gas to flow smoothly, the bottom surfaces of the first flow channel defining portion 641, the first central portion 642, and the first connection portion 644 may constitute a continuous plane.

[0131] In one example, the pair of first outer portions 643 may be formed and arranged symmetrically to each other around the center of the cover 600. The pair of first connection portions 644 may be formed and arranged symmetrically to each other around the center of the cover 600.

[0132] The first outer portion 643 may be formed in a vertical direction at a position overlapping the side portion 780 of the head portion 700. Due to this structure, the gas having reached the first outer portion 643 may smoothly flow toward the side portion 780 and then reach the second flame generating portion.

[0133] The lower portion may include a lower partition wall protruding upward from the upper surface of the cover 600, and the lower partition wall may surround the through hole 610. The gas having flowed through the through hole 610 may be guided along the lower partition wall to flow toward the first flow passage defining portion 641 and the first center portion 642.

[0134] The lower partition wall may constitute the walls of the first flow channel defining portion 641, the first center portion 642, the first outer portion 643, and the first connection portion 644. That is, the first flow channel defining portion 641, the first center portion 642, the first outer portion 643, and the first connection portion 644 may be constituted by a lower partition wall protruding upward from the upper surface of the cover 600.

[0135] In one example, the cover 600 may include a second spark plug receiving hole 650 into which the spark plug is inserted and mounted. The second spark plug receiving hole 650 may be positioned at a position corresponding to the first spark plug receiving hole 560 of the body 500. Therefore, the second spark plug receiving hole 650 may be disposed adjacent to the first flame generating portion 710 or adjacent to the second flame generating portion 720, depending on the position of the first spark plug receiving hole 560.

[0136] Fig.16 is a perspective view showing the cover 600 and the head 700 . Fig.17 yes Fig.16 Exploded top view of a stereogram. Fig.18 yes Fig.16 A bottom-up stereogram of . Fig.19 yes Fig.16 Top view of the .

[0137] Due to the use of the burner, foreign matter may remain on the head 700. Therefore, for hygienic purposes, cleaning of the head 700 is necessary. In order to clean the head 700, the head 700 can be easily removed from the burner.

[0138] Therefore, for example, it is necessary to couple the head 700 and the cover 600 or the body 500 using a fastening device so that a user can easily remove the head 700 from the burner using the fastening device when necessary.

[0139] A structure is required to guide the position of the head 700 so that the head 700 can be set at a correct position on the cover 600. For the guide, an insertion protrusion 772 may be formed on the head 700, and a protrusion receiving groove 660 may be formed in the cover 600.

[0140] When the insertion protrusion 772 of the head 700 is inserted into the protrusion receiving groove 660 of the cover 600, the head 700 can be set at a correct position on the cover 600. The insertion protrusion 772 and the protrusion receiving groove 660 will be additionally described below. Hereinafter, the head 700 will be described in detail.

[0141] Fig. 20 It is a three-dimensional diagram of the head 700 . Fig.21 yes Fig. 20 Bottom view of . Fig. 22 yes Fig. 20 Top view of the . Fig.23 yes Fig. 20 Views in different directions.

[0142] The head 700 may include a diffusion hole 730 and an upper portion 740. The diffusion hole 730 may be connected to the second duct 630 and may allow the gas to flow therein. The gas flowing into the diffusion hole 730 may flow into the second flame generating portion 720 and burn therein.

[0143] The diffusion hole 730 may include a pair of diffusion holes provided in an outer region of the head 700 and spaced apart from each other in a circumferential direction of the head. In a plan view, the diffusion hole 730 may be spaced apart from the through hole 610 in a circumferential direction of the head.

[0144] Therefore, a portion of the gas having flowed through the through hole 610 may flow toward the central area of ​​the header 700 along the second conduit 630. Another portion of the gas may flow back to the outer area of ​​the header 700, may flow through the diffusion hole 730, may diffuse in the circumferential direction in the space on the upper surface of the header 700, and may then flow into the second flame generating portion 720.

[0145] The upper portion 740 may be formed such that a portion thereof surrounds the diffusion hole 730, may protrude downward from the lower surface of the head 700, and may be coupled to the lower portion 640 to define an upper portion of the second duct 630. The lower portion 640 of the cover 600 and the upper portion 740 of the head 700 may be combined with each other to define the second duct 630.

[0146] The upper portion 740 may include a second flow passage defining portion 741, a second center portion 742, a second outer portion 743, and a second connection portion 744. The second flow passage defining portion 741 may cover the through hole 610, and may define a flow passage extending from the through hole 610 to a center area of ​​the head 700.

[0147] The gas that has flowed through the through-holes 610 and has flowed into the second flow-passage defining portion 741 may flow along the second flow-passage defining portion 741 from the outer region of the head 700 toward the central region thereof.

[0148] The second center portion 742 may be formed in a central region of the head portion 700, may be connected to the second flow passage defining portion 741, and may define a flow passage connected to the first flame generating portion 710. In the second center portion 742, the gas may be divided into a plurality of portions such that one portion may flow toward the first flame generating portion 710 and the remaining portion may flow toward the second flame generating portion 720.

[0149] A portion of the gas flowing into the second center portion 742 may flow upward and may flow into the first flame generating portion 710. Another portion thereof may flow back to the outer region of the head portion 700 along the second connection portion 744 and may reach the second outer portion 743.

[0150] The second outer portion 743 may surround the diffusion hole 730, may be disposed in an outer region of the head 700, and may define a flow passage connected to the second flame generating portion 720. The second outer portion 743 may include a pair of second outer portions spaced apart from each other in the circumferential direction. The gas flowing into the second outer portion 743 may flow upward, may flow through the diffusion hole 730 of the head 700, may flow along a space on an upper surface of the head 700, and may reach the second flame generating portion 720.

[0151] The second connection part 744 may define a flow channel connecting the inner space of the second outer portion 743 and the inner space of the second center portion 742. Since the second outer portion 743 includes a pair of second outer portions, the second connection part 744 may include a pair of second connection parts connected to the pair of second outer portions 743, respectively.

[0152] An opening may be formed in a side surface of the second center portion 742 , and the opening may be connected to the second outer portion 743 through the second connection portion 744 .

[0153] In one example, the pair of second outer portions 743 may be symmetrically arranged around the center of the head 700. The pair of second connection portions 744 may be symmetrically arranged around the center of the head 700.

[0154] The upper portion 740 may include an upper partition wall protruding downward from the lower surface of the head 700, and the upper partition wall may surround the through hole 610 formed in the outer region of the cover 600. The gas flowing through the through hole 610 may be guided along the upper partition wall to flow toward the second connection portion 744 and the second center portion 742.

[0155] The upper partition wall may constitute the walls of the second flow channel defining portion 741, the second center portion 742, the second outer portion 743, and the second connection portion 744. That is, the second flow channel defining portion 741, the second center portion 742, the second outer portion 743, and the second connection portion 744 may be constituted by an upper partition wall protruding downward from the lower surface of the head 700.

[0156] In order to prevent the gas flowing into the second duct 630 from leaking through the gap between the upper portion 740 and the lower portion 640 , contact surfaces of the partition wall respectively constituting the upper portion 740 and the lower portion 640 , which contact each other, may have the same shape.

[0157] The gas having flowed through the through hole 610 may flow from the outer region of the head 700 to the central region of the head 700 through the second conduit 630, and may be divided into a plurality of parts in the central region of the head 700. One of the plurality of parts into which the gas has been divided in the central region of the head 700 may reach the first flame generating portion 710, and may be ejected through the first flame hole 711 and may burn.

[0158] Another part of the gas into which the gas has been divided in the central area of ​​the head 700 can flow from the central area of ​​the head 700 to the outer area of ​​the head 700 through the second conduit 630, and can flow through the diffusion hole 730, and then can reach the second flame generating part 720, and can be sprayed through the second flame hole 721 and can burn.

[0159] The second duct 630 may include a first space defined by combining the first flow channel defining portion 641 and the second flow channel defining portion 741 with each other, a second space defined by combining the first center portion 642 and the second center portion 742 with each other, a third space defined by combining the first connection portion 644 and the second connection portion 744 with each other, and a fourth space formed by combining the first outer portion 643 and the second outer portion 743 with each other.

[0160] The gas may flow into the first space in the outer region of the second conduit 630, and may flow from the first space into the second space and reach the central region of the header 700. The gas may be divided into a plurality of parts in the second space. One of the plurality of parts may flow directly upward from the second space, and may flow upward through a central hole provided in an upper portion of the central region of the header 700, and may reach the first flame generating portion 710 connected to the central hole.

[0161] Another portion of the plurality of portions of the gas may flow through the third space and flow into a fourth space in the outer region of the header 700 , and may flow upward from the fourth space to reach the second flame generating portion 720 in the outer region of the header 700 .

[0162] In this manner, the gas having flowed through the through hole 610 may be divided into two parts in the second duct 630. One part thereof may reach the first flame generating part 710, and the other part may reach the second flame generating part 720.

[0163] The first flame generating portion 710 may be disposed in a central region of the head portion 700 and may protrude upward from an upper surface of the head portion 700. In addition, the second flame generating portion 720 may protrude upward from an upper surface of the head portion 700 in an outer region of the head portion 700. Thus, the second flame generating portion 720 may surround the first flame generating portion 710.

[0164] The head 700 may include a gas diffusion portion 750 and a flame propagation portion 760. The gas diffusion portion 750 may be embodied as a space in which the gas flowing through the diffusion holes 730 is diffused and surrounded by the upper surface of the head 700 and the second flame generation portion 720, and may extend along the periphery of the head 700.

[0165] The gas diffusion portion 750 may be embodied as a space connected to the second flame generating portion 720, and may extend in a ring shape having a constant width, and may be positioned toward the inside of the second flame generating portion 720. Therefore, the gas having flowed through the diffusion hole 730 may diffuse along the gas diffusion portion 750 and on the upper surface of the head portion 700, and flow into the second flame generating portion 720 uniformly in the circumferential direction of the second flame generating portion 720.

[0166] The inclined diffusion surface 761 may be provided at a position adjacent to the diffusion hole 730 to promote the flow and diffusion of the gas. That is, the inclined diffusion surface 761 may be defined on the upper surface of the head 700 and defined at a region where the diffusion hole 730 and the gas diffusion portion 750 are connected to each other, and may constitute each of two opposite ends of the diffusion hole 730. The inclined diffusion surface 761 may be inclined in the circumferential direction or the radial direction.

[0167] The inclined diffusion surface 761 may be formed on the upper surface of the head 700 to be inclined in the circumferential direction or the radial direction. Due to the inclined diffusion surface 761, the plane area size of the diffusion hole 730 may increase as the diffusion hole 730 extends upward.

[0168] Therefore, although the gas flowing into the gas diffusion portion 750 through the diffusion holes 730 may flow further upward, the gas may be guided along the inclined diffusion surface 761 so as to be smoothly diffused into the gas diffusion portion 750 and then uniformly distributed throughout the gas diffusion portion 750. As a result, the second flame generating portion 720 may receive a uniform supply of gas in the circumferential direction thereof, thereby generating a uniform flame in the circumferential direction thereof.

[0169] The flame propagation portion 760 may occupy a partial area of ​​the gas diffusion portion 750, so that the gas diffusion portion 750 may be discontinuous at the flame propagation portion 760. The flame propagation portion 760 may be embodied as a space in which a flame propagates between the first flame generating portion 710 and the second flame generating portion 720. A flame may be generated in the flame propagation portion 760, and the flame may flow from the first flame generating portion 710 to the second flame generating portion 720, or flow from the second flame generating portion 720 to the first flame generating portion 710 through the flame propagation portion 760.

[0170] Therefore, the flame generated in the first flame generating part 710 may flow to the second flame generating part 720, or conversely, the flame generated in the second flame generating part 720 may flow to the first flame generating part 710. Therefore, while the gas is supplied to the first flame generating part 710 and the second flame generating part 720, the flame may always exist in the first flame generating part 710 and the second flame generating part 720.

[0171] When the flame is not ignited or extinguished in one flame generating section, the flame of another flame generating section may flow through the propagation section, thereby generating a flame in the flame generating section having no flame.

[0172] The head 700 may include a diffusion portion defining protrusion 762 and a propagation portion defining protrusion 763. The diffusion portion defining protrusion 762 may be disposed between the first flame generating portion 710 and the second flame generating portion 720, protrude upward from the upper surface of the head 700, extend in the circumferential direction of the head 700, and surround the gas diffusion portion 750.

[0173] The gas diffusion portion 750 may be embodied as a space surrounded by the second flame generating portion 720 , the upper surface of the head portion 700 , the diffusion portion defining protrusion 762 , and the outer cap 810 .

[0174] The propagation portion defining protrusion 763 may protrude upward from the upper surface of the head 700, and may include a pair of propagation portion defining protrusions respectively disposed at two opposite sides of the flame propagation portion 760 to define the flame propagation portion 760. The propagation portion defining protrusion 763 may isolate the gas diffusion portion 750 and the flame propagation portion 760 from each other.

[0175] The propagation portion defining protrusion 763 may have a through hole extending therethrough so that the gas in the gas diffusion portion 750 is discharged through the through hole to the flame propagation portion 760. A flame may be generated at an outlet of the through hole, and then the flame may propagate from the first flame generation portion 710 to the second flame generation portion 720 through the flame propagation portion 760, and vice versa.

[0176] Fig.24 yes Fig.23 An enlarged view of portion 58. Fig.24 A portion of the first flame generating portion 710 is shown. Fig.25 yes Fig.23 An enlarged view of portion 59. Fig.25 A portion of the second flame generating portion 720 is shown.

[0177] The flame generating portion may include a flame hole through which the gas is injected. A flame may be generated at an outlet of the flame hole. The first flame generating portion 710 may include a first flame hole 711 , and the second flame generating portion 720 may include a second flame hole 721 .

[0178] The first flame hole 711 or the second flame hole 721 may be recessed into the upper end of the first flame generating portion 710 or the second flame generating portion 720. The first flame hole 711 may be covered with an inner cap 820, and the second flame hole 721 may be covered with an outer cap 810, so that the top of each of the first flame hole and the second flame hole may be blocked.

[0179] The depression depths of adjacent flame holes in the first flame generating portion 710 or the second flame generating portion 720 may be different from each other. For example, the first flame generating portion 710 may have deep first flame holes 711a and shallow first flame holes 711b arranged alternately with each other along the periphery. The deep second flame holes 721a and shallow second flame holes 721b may be arranged alternately with each other along the periphery of the second flame generating portion 720.

[0180] The recessed depth of the flame hole may be proportional to the amount of the fuel gas discharged to the outside through the flame hole. In addition, the size and length of the flame may be proportional to the amount of the fuel gas discharged through the flame hole.

[0181] Therefore, the deeper the depression depth of the flame hole is, the larger the size of the flame generated at the exit of the flame hole is. As the size of the flame increases, the possibility of adjacent flames merging with each other increases.

[0182] When the size of the flame becomes larger due to the merger, the gas inside the flame may not contact the air, which may cause incomplete combustion of the gas. Therefore, it is necessary to prevent the merger, thereby preventing incomplete combustion.

[0183] In an embodiment, a relatively deep flame hole can be arranged between relatively shallow flame holes. Due to this structure, the spacing between large flames that are likely to merge with each other can be increased, and relatively small flames can be placed between them, thereby effectively preventing the merger between adjacent flames.

[0184] In addition, when the flame generating part is formed only with a relatively shallow flame hole, the amount of gas discharged from the flame generating part is small, so that the burner cannot generate sufficient firepower. In an embodiment, a plurality of relatively deep flame holes may be arranged so that the gas can be fully discharged to the outside through the flame holes.

[0185] Fig.26 8 is a perspective view showing a state in which the outer cap 810 and the inner cap 820 are mounted on the head 700 . Fig. 27 yes Fig.26 Cross-sectional view of . Fig.28 yes Fig. 27 An enlarged view of portion 62 of the drawings. Fig.29 1 is a perspective view showing the inner cap 820 .

[0186] The burner may include an outer cap 810 and an inner cap 820 covering the flame generating portion. The outer cap 810 may be disposed on the upper end of each of the second flame generating portion 720 and the diffusion portion defining protrusion 762, and may cover the gas diffusion portion 750. The outer cap 810 may be disposed on the head 700, and cover the upper end of the gas diffusion portion 750.

[0187] Reference Fig.26 , the outer cap 810 may have an inclined cross-sectional shape. For example, the outer cap 810 may be formed such that its cross-sectional shape gradually inclines upward as the outer cap extends outward in the radial direction.

[0188] The head 700 may include a core 770, a side portion 780, a first support 791, and a second support 792. The core 770 may be disposed in a central region of the head 700, and the first flame generating portion 710 may be formed at an upper end of the core. The inner cap 820 may be disposed on an upper end of the core 770.

[0189] The side portion 780 occupies an outer region of the head 700, and the gas diffusion portion 750 may be defined in the side portion 780. The core 770 and the side portion 780 may be arranged to be spaced apart from each other and may be connected to each other via first and second supports 791 and 792 and a pair of second connection portions 744.

[0190] The first support 791 may connect the core 770 and the side portion 780 to each other and may meet the inner end of the flame spreading portion 760. The second support 792 may connect the core 770 and the side portion 780 to each other and may surround the core 770 opposite to the first support 791.

[0191] A pair of second connection parts 744, a first support member 791, and a second support member 792 can connect the core 770 and the side portion 780 to each other, and can be spaced apart from each other in the circumferential direction. A space can be defined between each of the pair of second connection parts 744 and each of the first support member 791 and the second support member 792.

[0192] The first flame generating portion 710 may be formed to protrude from an outer region of the core 770. In the core 770 and in a region inside the first flame generating portion 710, a space may be defined in which portions of the fuel gas flowing into the core 770 through the second duct 630 merge with each other.

[0193] The core 770 may include a plurality of guide protrusions 771 that protrude upward and are spaced apart from each other in the circumferential direction and guide the installation position of the inner cap 820. Each of the plurality of guide protrusions 771 may be disposed between adjacent first flame holes among the plurality of first flame holes 711. The inner cap 820 may include a guide ring 821 that protrudes downward and is formed to surround and contact the guide protrusion 771.

[0194] In order to stably position the inner cap 820 on the upper end of the core 770 , a guide protrusion 771 may be formed on the core 770 , and a guide ring 821 may be formed on the inner cap 820 .

[0195] The guide protrusion 771 may include a plurality of guide protrusions spaced apart from each other in the circumferential direction. When the inner cap 820 is placed on the core 770, the guide protrusion 771 may be located inside the guide ring 821 so as to contact the guide ring. The position of the inner cap 820 may be guided along the guide protrusion 771, so that it may not deviate laterally from the core 770.

[0196] Due to this structure, the inner cap 820 can be stably set at a designed position on the upper end of the core 770 and can maintain its position.

[0197] The core 770 may include a supporter 773 that contacts the lower surface of the inner cap 820 and supports the inner cap 820. The supporter 773 may be formed to gradually tilt upward as the support extends toward the inner side of the core 770. The inner cap 820 may be disposed on an upper surface of the supporter 773.

[0198] The supporter 773 may be disposed at an inner side of the guide protrusion 771. An upper surface of the supporter 773 may extend along a substantially straight line, and a lower surface of the supporter may be substantially curved.

[0199] The gas discharged from the flame hole of the first flame generating part 710 or the second flame generating part 720 can be mixed with the secondary air around the flame generating part to improve the combustion efficiency. Since the second flame generating part 720 is disposed in the outer area of ​​the burner, the gas discharged from the second flame hole 721 can actively contact the surrounding secondary air.

[0200] However, since the first flame generating portion 710 may be provided on the core 770 disposed in the central region of the burner, its contact area with the surrounding air may be reduced due to the outer cap 810 and other structures.

[0201] In consideration of this, according to an embodiment, the vertical height of the first flame generating portion 710 may be higher than the vertical height of the diffusion portion defining protrusion 762. Due to this structure, the vertical height of the first flame generating portion 710 may be higher than the vertical height of the outer cap 810. Therefore, the contact area of ​​the first flame generating portion 710 with the surrounding air may be increased.

[0202] Therefore, the first flame generating part 710 smoothly contacts the surrounding air, so that the fuel gas discharged from the first flame generating part 710 smoothly receives the surrounding secondary air, thereby preventing incomplete combustion due to insufficient supply of the secondary air.

[0203] The core 770 may include an insertion protrusion 772 that protrudes downward and is inserted into a groove defined in the cover 600. The cover 600 may include a protrusion receiving groove 660 that is recessed from the upper surface of the cover into the cover and is formed in a region corresponding to the insertion protrusion 772. The insertion protrusion 772 may be inserted into the protrusion receiving groove 660. The insertion protrusion 772 may include at least one insertion protrusion 772. The protrusion receiving groove 660 may include at least one protrusion receiving groove 660.

[0204] In order to make the head 700 easy to attach to and detach from the cover 600, while the head and the cover are coupled to each other at the designed position, a structure is required to guide their positions. Therefore, the core 770 may be provided with an insertion protrusion 772, and the cover 600 may be provided with a protrusion receiving groove 660.

[0205] Due to this structure, the head 700 can be stably disposed at a designed position on the upper end of the cover 600, and its position can be maintained.

[0206] Fig.305 is a diagram for illustrating the flow of gas in a burner according to an embodiment. In an embodiment, the gas discharged from a mixing tube 501 may flow into the first conduit 520 and the second conduit 630. In the first conduit 520, the gas may be divided into two parts that flow in opposite directions and in a circumferential direction. Then, the two parts may flow through the cover. Then, a part of each of the two parts may flow to the second flame generating part 720 disposed in the outer region of the burner, and the remaining part thereof may flow to the first flame generating part 710 disposed in the central region of the burner.

[0207] Specifically, when the gas flows through the mixing tube 501, the gas may be mixed with the primary air. Then, the mixture of the gas and the air may be discharged from the mixing tube 501 and then flow into the first duct 520. The gas flowing into the first duct 520 may flow into the second duct 630 through the through hole 610. The gas flowing into the second duct 630 may flow toward the central area of ​​the header 700 and may be divided into a plurality of parts in the central area of ​​the header 700.

[0208] One of the portions of the gas in the central region of the header 700 may immediately flow upward and may flow into the first flame generating portion 710 and may be discharged through the first flame hole 711 and may burn to generate flame.

[0209] Another part of the gas in the central area of ​​the head 700 may flow toward the outer area of ​​the head 700 through the space defined by the first connection portion 644 and the second connection portion 744, and may flow upward and flow through the diffusion hole 730. Then, the gas may diffuse along the gas diffusion portion 750, and may flow into the second flame generating portion 720, and may flow uniformly along the periphery of the second flame generating portion 720 provided in the outer area of ​​the head 700, and may be discharged through the second flame hole 721, and may burn to generate flames.

[0210] In an embodiment, the gas discharged from a single mixing tube 501 can be divided into a plurality of parts, which can be respectively supplied to a plurality of flame generating parts radially spaced apart from each other in the burner. Due to this structure, the flow channels for gas supply to the flame generating parts can be integrated with each other. The gas can be supplied to the burner using a single supply pipeline, and the flow channel structure in the burner can be simplified.

[0211] Although the present disclosure has been described with reference to the accompanying drawings, the present disclosure is not limited to the embodiments and drawings disclosed herein, and it is obvious that those skilled in the art can make various modifications within the technical concept of the present disclosure. In addition, although the effects of the configurations based on the present disclosure are not explicitly described and shown in the above description of the embodiments of the present disclosure, it is obvious that the predictable effects of the corresponding configurations should also be recognized.

Claims

1. A burner, comprising: main body; a cover disposed on a top of the body and coupled to the body to define a mixing tube in which gas and air flow and mix with each other; as well as a head disposed on top of the cover and configured to generate a flame, Wherein, the header includes: a first flame generating portion disposed in a central region of the head portion and having a plurality of first flame holes defined therein and arranged along a periphery of the first flame generating portion; and a second flame generating portion disposed in an outer region of the head portion and surrounding the first flame generating portion, wherein a plurality of second flame holes are defined in the second flame generating portion and arranged along a periphery of the second flame generating portion, Wherein, the body, the cover and the head are configured such that: The gas discharged from the mixing tube flows through the cover and then flows to the central area of ​​the cover. The gas is divided into a plurality of portions in a central region of the cover, and Then, one of the plurality of portions of the gas flows into the first flame generating portion, and another of the plurality of portions of the gas flows into the outer region of the cover and into the second flame generating portion.

2. The burner according to claim 1, wherein: The subject includes: a lower unit which is recessed from an upper surface of the main body into the main body and constitutes a lower portion of the mixing tube; and A first conduit is embodied as a space connected to an outlet of the mixing tube, wherein the first conduit changes a flow direction of the gas discharged from the mixing tube into an upward direction.

3. The burner according to claim 2, wherein: The subject includes: an injection portion constituting one side of the main body and having a gas injection hole defined therein; and An air receiving portion is provided between an inlet of the mixing pipe and an outlet of the injection portion, wherein a space into which the fuel gas is introduced and stored is defined in the air receiving portion.

4. The burner according to claim 3, wherein: The subject includes: a cover receiving groove which is recessed from an upper surface of the main body into the main body and has a shape corresponding to that of the cover so that the cover is seated in the cover receiving groove; a first spark plug receiving hole formed at a position overlapping the cover, wherein a spark plug is inserted and mounted into the first spark plug receiving hole; and An extension panel surrounds the cover receiving groove and extends in a lateral direction of the main body.

5. The burner according to claim 2, wherein: A through hole through which the gas flows is formed in the cover in a region of the cover at least partially overlapping the first conduit.

6. The burner according to claim 2, wherein: The cover includes an upper unit protruding downward toward the body, wherein the upper unit has an inner space recessed upward from a lower surface of the upper unit into the upper unit, wherein the inner space constitutes an upper portion of the mixing tube.

7. The burner according to claim 2, wherein: The burner further includes a second duct defined by a combination of the cover and the head, wherein the second duct has a space in which gas flowing from the body into the space flows between an outer region of the head and a central region of the head.

8. The burner according to claim 7, wherein: The cover comprises: a through hole connected to the first conduit, wherein the gas flows through the through hole; and A lower portion having a portion surrounding the through hole, wherein the lower portion protrudes upward from an upper surface of the cover and defines a lower portion of the second conduit.

9. The burner according to claim 8, wherein: The through holes include a pair of through holes that are provided in an outer region of the cover and are spaced apart from each other in a circumferential direction of the cover.

10. The burner according to claim 8, wherein The lower part comprises: a first flow passage defining portion surrounding the through hole and defining a flow passage extending from the through hole to a central area of ​​the cover; a first central portion disposed in a central region of the cover and connected to the first flow passage defining portion, wherein the first central portion defines a flow passage connected to the first flame generating portion; a first outer portion disposed in an outer region of the cover, wherein the first outer portion defines a flow passage connected to the second flame generating portion, wherein the first outer portion includes a pair of first outer portions spaced apart from each other in a circumferential direction of the cover; and A first connection portion defines a flow passage connecting an inner space of the first outer portion and an inner space of the first central portion to each other.

11. The burner according to claim 8, wherein: The cover includes a second spark plug receiving hole defined therein, wherein a spark plug is inserted and mounted into the second spark plug receiving hole.

12. The burner according to claim 8, wherein: The header includes: a diffusion hole connected to the second conduit, wherein the gas flows through the diffusion hole; and An upper portion having a portion surrounding the diffusion hole, wherein the upper portion protrudes downward from a lower surface of the head and is coupled to the lower portion to define an upper portion of the second duct.

13. The burner according to claim 12, wherein: The diffusion hole includes a pair of diffusion holes that are provided in an outer region of the head and are spaced apart from each other in a circumferential direction of the head.

14. The burner according to claim 13, wherein: The upper part comprises: a second flow passage defining portion covering the through hole and defining a flow passage extending from the through hole to a central area of ​​the head; a second central portion disposed in a central region of the head portion and connected to the second flow passage defining portion, wherein the second central portion defines a flow passage connected to the first flame generating portion; a second outer portion surrounding the diffusion hole and disposed in an outer region of the head portion, wherein the second outer portion defines a flow passage connected to the second flame generating portion and includes a pair of second outer portions spaced apart from each other in a circumferential direction of the head portion; and A second connection portion defines a flow passage connecting an inner space of the second outer portion and an inner space of the second central portion to each other.

15. The burner according to claim 12, wherein: The cover and the head are configured such that: The gas having flowed through the through hole flows from the outer area of ​​the head to the central area of ​​the head through the second conduit, A portion of the gas that has reached the central area of ​​the head reaches the first flame generating portion and is ejected through the first flame hole and burns, and Another portion of the fuel gas that has reached the central area of ​​the head passes through the second conduit and flows from the central area of ​​the head to the outer area of ​​the head, flows through the diffusion hole and then reaches the second flame generating portion, and is ejected through the second flame hole and burns.

16. The burner according to claim 12, wherein: The second flame generating portion protrudes upward from the upper surface of the head in an outer region of the head, Wherein, the header includes: a gas diffusion portion through which the gas having flowed through the diffusion hole diffuses, wherein the gas diffusion portion is embodied as a space surrounded by the upper surface of the head and the second flame generating portion, and the gas diffusion portion extends along the periphery of the head; and A flame propagation portion occupies a partial area of ​​the gas diffusion portion, so that the gas diffusion portion is discontinuous at the flame propagation portion, wherein the flame propagation portion is embodied as a space where the flame propagates between the first flame generation portion and the second flame generation portion.

17. The burner according to claim 16, wherein: The upper surface of the head has an inclined diffusion surface, which is provided at a position where the diffusion hole and the gas diffusion portion are connected to each other, wherein the inclined diffusion surface contacts each of two opposite ends of the diffusion hole and is inclined in a circumferential direction or a radial direction of the head.

18. The burner according to claim 16, wherein: The header includes: a diffusion portion defining protrusion disposed between the first flame generating portion and the second flame generating portion and protruding upward from an upper surface of the head portion, wherein the diffusion portion defining protrusion extends in a circumferential direction of the head portion and surrounds the gas diffusion portion; and A propagation portion defining protrusion protrudes upward from the upper surface of the head, wherein the propagation portion defining protrusion includes a pair of propagation portion defining protrusions respectively arranged on two opposite sides of the flame propagation portion so as to define the flame propagation portion between the pair of propagation portion defining protrusions.

19. The burner according to claim 18, further comprising: an outer cap disposed on an upper end of each of the second flame generating portion and the diffusion portion defining protrusion so as to cover the gas diffusion portion; as well as An inner cap is disposed on an upper end of the first flame generating portion.

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